(n.) A small European insectivore (Erinaceus Europaeus), and other allied species of Asia and Africa, having the hair on the upper part of its body mixed with prickles or spines. It is able to roll itself into a ball so as to present the spines outwardly in every direction. It is nocturnal in its habits, feeding chiefly upon insects.
(n.) The Canadian porcupine.
(n.) A species of Medicago (M. intertexta), the pods of which are armed with short spines; -- popularly so called.
(n.) A form of dredging machine.
Example Sentences:
(1) Two principal classes of striatum long axonal neurons (sparsely ramified reticular cells and densely ramified dendritic cells) were analyzed quantitatively in four animal species: hedgehog, rabbit, dog and monkey.
(2) The effect of methallibure (ICI 33828) on spermatogenesis was studied in the gerbil, hedgehog, and mouse.
(3) Mesenteric lymph nodes were examined from five hedgehogs captured on the Berkshire Downs.
(4) We suggest that the contralateral projection nuclei to the MOB of the hedgehog, unusual in other mammals, and the large number of cells with axonal collaterals projecting to both hemispheres, may be a strategy in these animals to bilaterally integrate brain functions at the expense of its reduced corpus callosum.
(5) Scottish Natural Heritage is exterminating them in the Outer Hebrides not because there is a plague of hedgehogs there but to protect the nests of the wading birds whose eggs and chicks a few escaped pet hedgehogs having been eating.
(6) Upper (Tf) and lower (Ts) temperature limits of order-disorder transitions in blood cell lipids of hedgehogs, Erinaceus europaeus, were determined over an annual cycle.
(7) In contrast, segmentation is essentially normal in l(1)armadillo, l(2)gooseberry, l(3)hedgehog, and l(1)fused embryos.
(8) However, the prolongation of the MAP at lower repolarization levels was much less in the hedgehog.
(9) John Byrom, a lazy, self-indulgent 18th-century versifier, had three black hedgehogs on his coat of arms.
(10) Forservices to the Rescue and Rehabilitation of Hedgehogs.
(11) Unlike any other animal in this country - except, perhaps, the mole, whose condition is, if anything, even more opaque, and just as likely to be following its own chute to oblivion - the hedgehog has always been a symbol and embodiment of something subtle and tender in the landscape.
(12) In a study of the elementary focus at Jarok, it was found that the frequency of antibodies was considerably higher in hedgehogs than in small rodents; this may be due to the longer life-cycle of the former, which makes the probability of reinfection greater.
(13) Only 11% of the 2,348 people who took part in the survey said they saw hedgehogs regularly in their gardens and 48% had never seen one.
(14) The histological structure of the testes and caput epididymidis of the hedgehog remains normal after 21 days of CdCl2 injection.
(15) The healing of the full-thickness skin wounds on the abdomen and the back of hedgehogs was investigated.
(16) We describe a study of the seasonal variations of hedgehog plasma lipids and lipoproteins and their correlation with changes in the activities of the thyroid and testis.
(17) Stories of hedgehog decline have been around for years, but only now is Bright completing the first statistically robust report on the drop in numbers.
(18) The granule cell islands in the olfactory tubercle (islands of Calleja) and the insula magna of Calleja are present in all species examined in this study: cat, rat, mouse, rabbit, hedgehog, monkey, man, and dolphin, displaying the same basic morphology.
(19) In animal homes and private care hibernating hedgehogs excreted larvae of Crenosoma striatum (23.5% and 21.0%, respectively), eggs of Capillaria species of the intestine (47.1% and 37.1%), and eggs of Capillaria aerophila (7.1% and 19.4%), but oocysts of Isospora rastegaievae were found to be predominant (44.7% and 32.3%).
(20) It is presumed that leptospires of the serogroups Javanica, Australis, Icterohaemorrhagiae, transmitted by the shrew-mice, hedgehogs and rats by the sexual route, are by their origin "ancient" serogroups of leptospires while the serogroups of leptospires isolated from domestic animals, showing predominantly the alimentary route of transmission of infection in the focus, are representatives of the "younger" forms of the evolutional development of leptospires.
Urchin
Definition:
(n.) A hedgehog.
(n.) A sea urchin. See Sea urchin.
(n.) A mischievous elf supposed sometimes to take the form a hedgehog.
(n.) A pert or roguish child; -- now commonly used only of a boy.
(n.) One of a pair in a series of small card cylinders, arranged around a carding drum; -- so called from its fancied resemblance to the hedgehog.
(a.) Rough; pricking; piercing.
Example Sentences:
(1) CyIIIa.CAT) expression simultaneously in embryos bearing excess competitor regulatory DNA, we developed, and here describe, a new procedure for generating transgenic sea urchin embryos in which all of the cells in many embryos, and most in others, bear the exogenous DNA.
(2) An oligonucleosome 12-mer was reconstituted in the absence of linker histones, onto a DNA template consisting of 12 tandemly arranged 208-base pair fragments of the 5 S rRNA gene from the sea urchin Ly-techinus variegatus (Simpson, R. T., Thoma, F. S., and Burbaker, J. M. (1985) Cell 42, 799-808).
(3) 1c for structure), for continuous measurement of [Ca2+]i from fertilization through the first cleavage of individual eggs of the sea urchin Lytechinus pictus.
(4) The agglutination of the sea urchin spermatozoa was inhibited specifically by ceratain carbohydrates.
(5) The levels of different classes of mitochondrially encoded transcripts are developmentally regulated in sea urchin embryos, as a result of selection between mutually exclusive synthetic pathways.
(6) Antimicrobial activity of polyhydroxynaphthoquinones from sea urchins was studied.
(7) A special type of beta-turn structural motif has been proposed for this sequence, and it has been shown that a segment of the sea urchin sperm H1 N terminus, which has six repeats of the motif (S6 peptide), binds to DNA and competes with the DNA binding drug Hoechst 33258.
(8) The fertilization reaction of echinoderm eggs (Lytechinus pictus, a sea urchin, and Dendraster excentricus, a sand dollar) was followed with intracellular electrodes.
(9) Sperm-specific histone variants in the sea urchin Paracentrotus lividus are replaced early after fertilization with a specific embryonic set of histone variants.
(10) Spermidine is rapidly taken up and becomes bound to protein during the very early hours of sea urchin embryogenesis.
(11) The tandemly repeated genes were expressed at a higher rate in blastula than in gastrula stage relative to the single-copy gene, when the two genes were injected into sea urchin zygotes.
(12) The purine inhibits the detachment of the vitelline layer from the sea-urchin egg plasma membrane after fertilization and this effect leads to polyspermy.
(13) Microtubule assembly is required for the formation of the male and female pronuclei during mouse, but not sea urchin, fertilization.
(14) In situ hybridization of sea urchin (Psammechinus miliaris, Lytechinus pictus and Strongylocentrotus purpuratus) histone messenger RNA has been used to map complementary sequences on polytene chromosomes from Drosophila melanogaster.
(15) We have examined the relationship between the newly synthesized mRNA that enters polysomes in sea urchin embryos and the messengerlike RNA that enters the pool of ribosome-free ribonucleoprotein particles (free RNPs or informosomes).
(16) Individual oocytes of the sea urchin with diameters which ranged from 86 to 102% that of the average diameter for mature eggs from the same female were examined.
(17) Puncture wounds were cuased in 9 patients by sea urchin spines and 1 patient by a date palm thorn.
(18) A method based on the degradation by enzymes and nitrous acid of isotopically labelled glycosaminoglycans has been employed to study the synthesis of these compounds in normal, animalized and vegetalized sea urchin embryos.
(19) From these results, we conclude that USE 1 and perhaps USE 2 in the H2A modulator are upstream transcriptional elements that are recognized by trans-acting factors common to Xenopus and sea urchin.
(20) We have used an in vitro assay to characterize some of the motile properties of sea urchin egg kinesin.